燃煤电厂脱硫废水零排放治理技术路线分析与选择

燃煤电厂普遍使用的石灰石-石膏湿法脱硫装置运行过程中会产生含有污染物的废水。近年来，脱硫废水零排放治理技术路线越来越丰富多样，多个不同技术路线的治理示范工程已经建成投运。本文将多样的工艺技术流程统一分解归类，划分为三个单元：预处理单元、浓缩减量单元和尾水固化单元，三个单元组合形成“预处理+浓缩减量+尾水固化”的技术路线。通过分析三条典型技术路线的示范工程，结合治理能力、系统设计、经济成本等应用情况，说明了三条典型技术路线的优缺点。提出今后在燃煤发电行业更大范围开展脱硫废水零排放治理的可行技术选择建议。

Analysis and selection for desulphurization wastewater zero discharge technology roadmap in Coal-fired power plant

Limestone-gypsum wet desulfurization is used in coal-fired power plants widely. This device would generate some wastewater which contains much pollutant. In recent years, more and more zero emission roadmaps of desulphurization wastewater disposal has been developed, and many demonstration projects have been built into operation. This paper classifies these methods into three units：pretreatment, concentration and solidification, which can be combined as one complete technology roadmap. This paper concludes the advantages and disadvantages by analyzing reliability, economic cost, and practical effect of demonstration projects, then gives out technically feasible advice for desulphurization wastewater disposal on future lager scale use in coal-fired power industry.